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Polypropylene (PP)

Technical Data Sheets

cross reference table

Polypropylene (PP) is a linear hydrocarbon polymer, expressed with the chemical formula C3H6. PP, like polyethylene and polybutene (PB), is a polyolefin or saturated polymer.

Product Characteristics:

  • Semi-rigid
  • Translucent
  • Good chemical resistance
  • Tough
  • Good fatigue resistance
  • Integral hinge property
  • Good heat resistance
PP does not present stress-cracking problems and offers excellent electrical and chemical resistance at higher temperatures. While the properties of PP are similar to those of Polyethylene, there are specific differences. These include a lower density, higher softening point (PP doesn't melt below 160oC, Polyethylene, a more common plastic, will anneal at around 100oC) and higher rigidity and hardness. Additives are applied to all commercially produced polypropylene resins to protect the polymer during processing and to enhance end-use performance.

Typical field of application:

Polypropylene is one of those most versatile polymers available with applications, both as a plastic and as a fibre, in virtually all of the plastics end-use markets.
It is used in many different settings, both in industry and in consumer goods, to name the major fields as industrial molds, rugged currency, car parts, or storage containers. It can be used both as a structural plastic and as a fiber.
This plastic is often used for food containers, particularly those that need to be dishwasher safe.
Polypropylene is also very easy to add dyes to, and it is often used as a fiber in carpeting that needs to be rugged and durable, such as that for use around swimming pools or on miniature golf courses. Unlike nylon, which is also often used as a fiber for rugged carpeting, it doesn't soak up water, making it ideal for uses where it will be constantly subject to moisture.

Production technology

The whole polypropylene (PP) and polyethylene(PE) product families are produced under the LyondellBasell technology offering the variety of grades for different uses as well as consistent technical characteristics to avoid long approval process and production lines adjustments on switching from one supply source to another.

Polypropylene (PP) grades

Three types of polypropylene are currently available. Each suits particular specifications and costing (although there is often some overlap).
Homopolymers - A General Purpose Grade that can be used in a variety of different applications.
Block copolymers - incorporating 5-15% ethylene, have much improved impact resistance extending to temperatures below -20oC. Their toughness can be further enhanced by the addition of impact modifiers, traditionally elastomers in a blending process.
Random copolymers - incorporate co-monomer units arranged randomly (as distinct from discrete blocks) along the polypropylene long chain molecule. Such polymers typically containing 1-7% ethylene are selected where a lower melting point, more flexibility and enhanced clarity are advantageous.
Different PP grades are available dependent on the application and chosen processing method.

 

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product information page generated on: Tue Jan 14 17:25:49 CET 2014